Github user srowen commented on the issue:
https://github.com/apache/spark/pull/14051
@zsxwing crumbs, thanks for that. It looks reasonably sure it's related,
though, I still can't quite figure out how it would cause this failure:
```
[error]
Github user zsxwing commented on the issue:
https://github.com/apache/spark/pull/14051
This one broke branch 1.6. I just reverted it. Please resubmit a backport
for branch 1.6.
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Github user srowen commented on the issue:
https://github.com/apache/spark/pull/14051
Merged to master/2.0/1.6. I think it's a reasonably important bug fix.
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